The hottest scientists use DNA as a template for n
2022-10-16- Detail
Scientists use DNA as a nano printing template
DNA is the most commonly used building block in nanotechnology, which is usually used to control the construction of orderly nanostructures. To a large extent, people believe that DNA is expected to become the basic module for the bottom-up manufacturing of micro electronic circuits
now, a group of scientists from brightam young university in the United States have combined DNA self-organization technology with micro manufacturing printing to produce structures such as nanochannels, nanowires and nanogrooves. This discovery opens up a new path for nano processing in sizes that cannot be reached by optical printing at present. Their results were published in the latest issue of Smal stress time formula calculation L
researchers Adam Woolley and Hector becerril invented a method using DNA as a template to define basal patterns. They assume that DN is the same as PHB made by bacteria. A is arranged neatly on the substrate, and then a metal film is deposited on it. DNA molecules act as nano wax paper, so as to define some patterns less than 10 nm on the substrate, such as temperature, gas atmosphere, chemical and biological environment, etc. Because the metal film is deposited at a certain angle, and the projection of DNA molecules defines the scale of the pattern on the substrate, this method is called DNA projection nanoprinting by researchers
after that, researchers used the active gas plasma commonly used in the semiconductor industry to etch the pattern surface anisotropically, and obtained grooves with high aspect ratio on the substrate. These grooves can be sealed at the top to form continuous nano channels; Or it can be chemically functionalized as a template for depositing metal nanowires. These template grooves and produced nanowires have a cross-section of only 30 nm and can be cut to less than 10 nm. The exact size of the trench can be controlled by changing the deposition angle and thickness
researchers believe that surface aligned DNA molecules can be used to convert complex patterns to substrates. Wooley said: the feature of this technology is that it can use DNA to form patterns without requiring DNA to keep its nucleic acid structure unchanged. He believes that DNA projection nanoprinting can be applied in the field of nanofluid channels and chemical sensors
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